某燃气轮发电机使用的导电螺钉（T2铜）在使用过程中发生断裂，引起发电机跳闸。为找出导电螺钉断裂的原因，对导电螺钉进行了宏观检查、结构分析、化学成分分析、断口分析、金相检验和力学性能测试。结果表明：该导电螺钉发生断裂失效是由结构应力和高温下螺钉强度降低导致的，最后给出了相应的改进建议。

The conductive screw (T2 copper) of a gas turbine generator fractured during use, resulting in the tripping of the generator. To find out the fracture causes, the conductive screw was analyzed from the aspects of macroscopic examination, structure analysis, chemical composition analysis, fracture analysis, metallographic examination and mechanical property test. The results show that the fracture failure of the conductive screw was due to the structural stress and the decreased strength at the high temperature. Finally, the corresponding improvement suggestions were given.